Please review the details on the Tucson Atheists Meetup.com site:
The goal of these events is to have fun socializing with fellow secular humanists. We will have no agenda, and no lectures, though you can expect a fair bit of atheism talk. The Red Garter is a bar and grill, so it's open to all ages. There are pool tables, dart boards, video games, TV and more. As far as food goes, they've got burgers, sandwiches, typical bar and grill fare, as well as 15+ beers on tap and more in bottles, plus a stocked bar. We meet at 6pm every other Thursday at the Red Garter on Speedway (just a bit east of Country Club)
This event is sponsored by Tucson Atheists.